Features 1、Cotton Material: Made of premium cotton material, these socks are soft, breathable, fast drying, and possesses strong elastic, which can provide you with good wearing experiences! 2、Self Heating: Underside of the socks, there are tourmaline design that heats themselves to help your feet relax and unwind in cold weather. 3、Wide Application: These socks are suitable for all kinds of outdoor activities such as mountaineering, skiing, fishing, jogging and fit for work in the camp, shoveling snow etc. 4、Universal Size: These socks adopts universal size design that can relieve leg fatigue, relieve pain, regulate the nervous system, heat yourself, remove moisture, etc. Take them with confidence! 5、Gifts for People: Possess both practicality and universal size, these socks are ideal gifts for you to sent to your parents, friends, very useful gift! Specification Item Type: Self Heating Socks Material: Cotton Size: Free size Package List 4 x Self Heating Socks